Index: TODO
===================================================================
diff -u -r25023d3c048b369645973fdfa125a3705c7f1898 -rd66258cafa0a21e1b10fa42951de7e71f63a1817
--- TODO	(.../TODO)	(revision 25023d3c048b369645973fdfa125a3705c7f1898)
+++ TODO	(.../TODO)	(revision d66258cafa0a21e1b10fa42951de7e71f63a1817)
@@ -4951,14 +4951,17 @@
 nx-mongo:
 - added command "::mongo::status /mongoConn/"
 - extended regression test
+
+nsf.c:
+- invalidate paramter caches of subclasses on
+  NsfParameterInvalidateClassCacheCmd unless during
+  shutdown. Otherwise some classes might not become aware of
+  properties added later to superclasses.
+- extended regression test
+
 ========================================================================
 TODO:
 
-- Why do we still have a method volatile in nx? Why not leave it as
-  configure/cget configuration option only?! At least, I cannot recall the
-  rationale behind keeping the method anymore :/
-  * why the question ... now?
-
 - remove / rephrase "//"-comments
 - ParamGetDomain(Nsf_Param CONST *paramPtr) does not work
   for enumeration types defined in derived packages, having
Index: generic/nsf.c
===================================================================
diff -u -r74b7a4066526ff5f5a8080ed907f71c9ed5c7700 -rd66258cafa0a21e1b10fa42951de7e71f63a1817
--- generic/nsf.c	(.../nsf.c)	(revision 74b7a4066526ff5f5a8080ed907f71c9ed5c7700)
+++ generic/nsf.c	(.../nsf.c)	(revision d66258cafa0a21e1b10fa42951de7e71f63a1817)
@@ -21412,9 +21412,29 @@
     ParsedParamFree(cl->parsedParamPtr);
     cl->parsedParamPtr = NULL;
   }
+
+  /*
+   * Omit storm of invalidations on shutdown.
+   */
+  if (unlikely(RUNTIME_STATE(interp)->exitHandlerDestroyRound == NSF_EXITHANDLER_OFF)) {
+    NsfClasses *subClasses = TransitiveSubClasses(cl), *clPtr;
+    /*
+     * invalidate cached parameters in subclasses
+     */
+    for (clPtr = subClasses; clPtr; clPtr = clPtr->nextPtr) {
+      NsfClass *subClass = clPtr->cl;
+      if (subClass->parsedParamPtr) {
+        ParsedParamFree(subClass->parsedParamPtr);
+        subClass->parsedParamPtr = NULL;
+      }
+    }
+    NsfClassListFree(subClasses);
+  }
+
   return TCL_OK;
 }
 
+
 /*
 cmd parameter:invalidate::objectcache NsfParameterInvalidateObjectCacheCmd {
   {-argName "object" -required 1 -type object}
@@ -22344,6 +22364,7 @@
 
   if (likely(class && class->parsedParamPtr)) {
     NsfParsedParam *clParsedParamPtr = class->parsedParamPtr;
+
     parsedParamPtr->paramDefs = clParsedParamPtr->paramDefs;
     parsedParamPtr->possibleUnknowns = clParsedParamPtr->possibleUnknowns;
     result = TCL_OK;
@@ -22391,6 +22412,7 @@
 	  ppDefPtr->paramDefs = parsedParamPtr->paramDefs;
 	  ppDefPtr->possibleUnknowns = parsedParamPtr->possibleUnknowns;
 	  if (class) {
+            assert(class->parsedParamPtr == NULL);
 	    class->parsedParamPtr = ppDefPtr;
 #if defined(PER_OBJECT_PARAMETER_CACHING)
 	  } else {
@@ -23781,11 +23803,11 @@
 }
 
 /*
-classMethod getCachedParameters NsfCGetCachendParameters {
+classMethod getCachedParameters NsfCGetCachendParametersMethod {
 }
 */
 static int
-NsfCGetCachendParameters(Tcl_Interp *interp, NsfClass *class) {
+NsfCGetCachendParametersMethod(Tcl_Interp *interp, NsfClass *class) {
 
   if (likely(class && class->parsedParamPtr && class->parsedParamPtr->paramDefs)) {
     Tcl_Obj *listObj;
Index: generic/nsfAPI.decls
===================================================================
diff -u -r4bc60e16c10fdbbb640b3019d4bdebdc469fdf55 -rd66258cafa0a21e1b10fa42951de7e71f63a1817
--- generic/nsfAPI.decls	(.../nsfAPI.decls)	(revision 4bc60e16c10fdbbb640b3019d4bdebdc469fdf55)
+++ generic/nsfAPI.decls	(.../nsfAPI.decls)	(revision d66258cafa0a21e1b10fa42951de7e71f63a1817)
@@ -345,7 +345,7 @@
   {-argName "guard" -required 1 -type tclobj}
 }
 
-classMethod getCachedParameters NsfCGetCachendParameters {
+classMethod getCachedParameters NsfCGetCachendParametersMethod {
 }
 
 classMethod mixinguard NsfCMixinGuardMethod {
Index: generic/nsfAPI.h
===================================================================
diff -u -r4bc60e16c10fdbbb640b3019d4bdebdc469fdf55 -rd66258cafa0a21e1b10fa42951de7e71f63a1817
--- generic/nsfAPI.h	(.../nsfAPI.h)	(revision 4bc60e16c10fdbbb640b3019d4bdebdc469fdf55)
+++ generic/nsfAPI.h	(.../nsfAPI.h)	(revision d66258cafa0a21e1b10fa42951de7e71f63a1817)
@@ -293,7 +293,7 @@
 static int NsfCCreateMethodStub(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv []);
 static int NsfCDeallocMethodStub(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv []);
 static int NsfCFilterGuardMethodStub(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv []);
-static int NsfCGetCachendParametersStub(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv []);
+static int NsfCGetCachendParametersMethodStub(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv []);
 static int NsfCMixinGuardMethodStub(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv []);
 static int NsfCNewMethodStub(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv []);
 static int NsfCRecreateMethodStub(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv []);
@@ -399,7 +399,7 @@
 static int NsfCCreateMethod(Tcl_Interp *interp, NsfClass *cl, CONST char *objectName, int objc, Tcl_Obj *CONST objv[]);
 static int NsfCDeallocMethod(Tcl_Interp *interp, NsfClass *cl, Tcl_Obj *object);
 static int NsfCFilterGuardMethod(Tcl_Interp *interp, NsfClass *cl, CONST char *filter, Tcl_Obj *guard);
-static int NsfCGetCachendParameters(Tcl_Interp *interp, NsfClass *cl);
+static int NsfCGetCachendParametersMethod(Tcl_Interp *interp, NsfClass *cl);
 static int NsfCMixinGuardMethod(Tcl_Interp *interp, NsfClass *cl, Tcl_Obj *mixin, Tcl_Obj *guard);
 static int NsfCNewMethod(Tcl_Interp *interp, NsfClass *cl, Tcl_Obj *withChildof, int nobjc, Tcl_Obj *CONST nobjv[]);
 static int NsfCRecreateMethod(Tcl_Interp *interp, NsfClass *cl, Tcl_Obj *objectName, int objc, Tcl_Obj *CONST objv[]);
@@ -506,7 +506,7 @@
  NsfCCreateMethodIdx,
  NsfCDeallocMethodIdx,
  NsfCFilterGuardMethodIdx,
- NsfCGetCachendParametersIdx,
+ NsfCGetCachendParametersMethodIdx,
  NsfCMixinGuardMethodIdx,
  NsfCNewMethodIdx,
  NsfCRecreateMethodIdx,
@@ -686,19 +686,19 @@
 }
 
 static int
-NsfCGetCachendParametersStub(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]) {
+NsfCGetCachendParametersMethodStub(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]) {
   NsfClass *cl =  NsfObjectToClass(clientData);
   assert(objc > 0);
   if (unlikely(cl == NULL)) return NsfDispatchClientDataError(interp, clientData, "class", ObjStr(objv[0]));
     
 
       if (unlikely(objc != 1)) {
 	return NsfArgumentError(interp, "too many arguments:", 
-			     method_definitions[NsfCGetCachendParametersIdx].paramDefs,
+			     method_definitions[NsfCGetCachendParametersMethodIdx].paramDefs,
 			     NULL, objv[0]); 
       } 
     
-    return NsfCGetCachendParameters(interp, cl);
+    return NsfCGetCachendParametersMethod(interp, cl);
 
 }
 
@@ -2739,7 +2739,7 @@
   {"filter", NSF_ARG_REQUIRED, 1, Nsf_ConvertTo_String, NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL},
   {"guard", NSF_ARG_REQUIRED, 1, Nsf_ConvertTo_Tclobj, NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL}}
 },
-{"::nsf::methods::class::getCachedParameters", NsfCGetCachendParametersStub, 0, {
+{"::nsf::methods::class::getCachedParameters", NsfCGetCachendParametersMethodStub, 0, {
   {NULL, 0, 0, NULL, NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL}}
 },
 {"::nsf::methods::class::mixinguard", NsfCMixinGuardMethodStub, 2, {
Index: tests/properties.test
===================================================================
diff -u -r74b7a4066526ff5f5a8080ed907f71c9ed5c7700 -rd66258cafa0a21e1b10fa42951de7e71f63a1817
--- tests/properties.test	(.../properties.test)	(revision 74b7a4066526ff5f5a8080ed907f71c9ed5c7700)
+++ tests/properties.test	(.../properties.test)	(revision d66258cafa0a21e1b10fa42951de7e71f63a1817)
@@ -832,6 +832,48 @@
   ? {o1 cget -class} ::nx::Object
 }
 
+nx::test case extend-parent-class-info {
+
+  nx::Class create Foo
+  nx::Class create Bar -superclass Foo
+  ? {llength [Bar info configure parameters]} 4
+  #
+  # extend the superclass, subclass should become aware of this
+  #
+  Foo property y
+  ? {llength [Bar info configure parameters]} 5
+}
+
+nx::test case extend-parent-class-info-cache {
+
+  nx::Class create Foo
+  nx::Class create Bar -superclass Foo
+  ? {llength [Bar info configure parameters]} 4
+  #
+  # Let Bar cache the objectparameters, and extend later the
+  # superclass
+  #
+  Bar new
+  Foo property y
+  ? {llength [Bar info configure parameters]} 5
+}
+
+nx::test case extend-parent-class-info-cache-configure {
+
+  nx::Class create Foo
+  nx::Class create Bar -superclass Foo
+  ? {llength [Bar info configure parameters]} 4
+  #
+  # Let Bar cache the objectparameters, and extend later the
+  # superclass
+  #
+  Bar create b1
+  Foo property y
+  # access obejctparamter indirectly via configure
+  ? {b1 configure -y 2} ""
+}
+
+
 #
 # Local variables:
 #    mode: tcl